Stoppage-inducing ammunition cartridges have a case having a rear head surface, a circumferential extractor groove forward of the rear head surface, a body portion forward of the circumferential extractor groove defining a case axis perpendicular to the rear head surface, and a forward mouth, a primer received in the case, a propellent within the case, a bullet received in the forward mouth, and the circumferential extractor groove being defined in part by a rear extractor surface angularly disposed with respect to a plane perpendicular to the case axis, such that an extractor adapted to engage a groove surface perpendicular to the case axis will have limited effect at extracting the cartridge from a firearm chamber after discharge. The rear extractor surface may be a frustoconical surface. The rear extractor surface may be a tapered surface acutely angled with respect to the case axis.

Stoppage-inducing ammunition cartridges have a case having a rear head surface, a circumferential extractor groove forward of the rear head surface, a body portion forward of the circumferential extractor groove defining a case axis perpendicular to the rear head surface, and a forward mouth, a primer received in the case, a propellent within the case, a bullet received in the forward mouth, and the circumferential extractor groove being defined in part by a rear extractor surface angularly disposed with respect to a plane perpendicular to the case axis, such that an extractor adapted to engage a groove surface perpendicular to the case axis will have limited effect at extracting the cartridge from a firearm chamber after discharge. The rear extractor surface may be a frustoconical surface. The rear extractor surface may be a tapered surface acutely angled with respect to the case axis.

A cartridge to be fired through a barrel comprises a cartridge body with a maximum outer diameter, and a removable and replaceable driving band with an outer diameter greater than the diameter of the cartridge body. The driving band is positioned on the cartridge body such that it is the only part of the cartridge that engages the barrel through which it is fired.

A system for firing reduced energy cartridges from a modern sporting rifle utilizes a bolt assembly weighing less than a conventional bolt assembly for such rifles and utilizes blow back for cycling the bolt assembly rather than gas operation. A bolt insert in a polymer bolt carrier of the bolt assembly has a projection that fits within a recess on the rear face of reduced energy cartridges. The reduced energy cartridges having a polymer casing, a rimfire power load for propellant, the power load recessed from the rear face of the casing. The power load seats in in the casing surrounded by a reinforcement liner embedded in the polymer casing.

A system for firing reduced energy cartridges from a modern sporting rifle utilizes a bolt assembly weighing less than a conventional bolt assembly for such rifles and utilizes blow back for cycling the bolt assembly rather than gas operation. A bolt insert in a polymer bolt carrier of the bolt assembly has a projection that fits within a recess on the rear face of reduced energy cartridges. The reduced energy cartridges having a polymer casing, a rimfire power load for propellant, the power load recessed from the rear face of the casing. The power load seats in in the casing surrounded by a reinforcement liner embedded in the polymer casing.

A launch canister for non-lethal pellets may be used to simulate the use of both personal and anti-personnel weapons. The canister features at least two components, an inner core and outer shell, that are nested and both featuring a plurality of launch bores. Gaskets ring the outside surface of the components, but have slight interface with the internal bores. The gaskets then hold a stack of pellets within each bore until the canister is placed in a launch device and the payload released.

A launch canister for non-lethal pellets may be used to simulate the use of both personal and anti-personnel weapons. The canister features at least two components, an inner core and outer shell, that are nested and both featuring a plurality of launch bores. Gaskets ring the outside surface of the components, but have slight interface with the internal bores. The gaskets then hold a stack of pellets within each bore until the canister is placed in a launch device and the payload released.

Provided is a non-pyro cartridge for military training devices. The cartridge has a refillable compressed gas compartment fitted with a refill valve, which allows for quick reuse of the cartridge. The cartridge further has a blast compartment that receive a rush of compressed air from the gas compartment when the cartridge is triggered/detonated. Also provided is an activation device for the cartridge. The cartridge and activation device can generate physical and digital effects on the battlefield that safely and realistically simulate anti-tank weapon signatures, mortar weapon signatures, landmines signatures, improvised explosive device weapon signatures, artillery point of impact signatures, hand grenade signatures, weapon impact signatures on vehicles, weapon impact signatures on buildings, multiple types of battlefield effects, weapon signatures, impact signatures with a single device type.

Provided is a non-pyro cartridge for military training devices. The cartridge has a refillable compressed gas compartment fitted with a refill valve, which allows for quick reuse of the cartridge. The cartridge further has a blast compartment that receive a rush of compressed air from the gas compartment when the cartridge is triggered/detonated. Also provided is an activation device for the cartridge. The cartridge and activation device can generate physical and digital effects on the battlefield that safely and realistically simulate anti-tank weapon signatures, mortar weapon signatures, landmines signatures, improvised explosive device weapon signatures, artillery point of impact signatures, hand grenade signatures, weapon impact signatures on vehicles, weapon impact signatures on buildings, multiple types of battlefield effects, weapon signatures, impact signatures with a single device type.

Systems, methods and apparatus are provided through which in some implementations an ammunition cartridge includes a cartridge casing having a longitudinal center axis, a powder pocket positioned adjacent to the cartridge casing, a piston bore positioned adjacent to the powder pocket, a piston in the piston bore, and a payload bay positioned adjacent to the payload bay, wherein the piston is not coupled to the cartridge, wherein the piston is in direct contact with the payload bay wherein a diameter of the powder pocket is less than an inside diameter of the cartridge casing to provide a reduced velocity to the payload.